using System;
using System.IO;
using StardewModdingAPI.Events;
using StardewModdingAPI.Framework.Input;

namespace StardewModdingAPI.Framework.ModHelpers;

/// <summary>Provides simplified APIs for writing mods.</summary>
internal class ModHelper : BaseHelper, IModHelper, IDisposable
{
    /*********
    ** Accessors
    *********/
    /// <inheritdoc />
    public string DirectoryPath { get; }

    /// <inheritdoc />
    public IModEvents Events { get; }

    /// <inheritdoc />
    public IGameContentHelper GameContent { get; }

    /// <inheritdoc />
    public IModContentHelper ModContent { get; }

    /// <inheritdoc />
    public IContentPackHelper ContentPacks { get; }

    /// <inheritdoc />
    public IDataHelper Data { get; }

    /// <inheritdoc />
    public IInputHelper Input { get; }

    /// <inheritdoc />
    public IReflectionHelper Reflection { get; }

    /// <inheritdoc />
    public IModRegistry ModRegistry { get; }

    /// <inheritdoc />
    public ICommandHelper ConsoleCommands { get; }

    /// <inheritdoc />
    public IMultiplayerHelper Multiplayer { get; }

    /// <inheritdoc />
    public ITranslationHelper Translation { get; }


    /*********
    ** Public methods
    *********/
    /// <summary>Construct an instance.</summary>
    /// <param name="mod">The mod using this instance.</param>
    /// <param name="modDirectory">The full path to the mod's folder.</param>
    /// <param name="currentInputState">Manages the game's input state for the current player instance. That may not be the main player in split-screen mode.</param>
    /// <param name="events">Manages access to events raised by SMAPI.</param>
    /// <param name="gameContentHelper">An API for loading content assets from the game's <c>Content</c> folder or via <see cref="IModEvents.Content"/>.</param>
    /// <param name="modContentHelper">An API for loading content assets from your mod's files.</param>
    /// <param name="contentPackHelper">An API for managing content packs.</param>
    /// <param name="commandHelper">An API for managing console commands.</param>
    /// <param name="dataHelper">An API for reading and writing persistent mod data.</param>
    /// <param name="modRegistry">an API for fetching metadata about loaded mods.</param>
    /// <param name="reflectionHelper">An API for accessing private game code.</param>
    /// <param name="multiplayer">Provides multiplayer utilities.</param>
    /// <param name="translationHelper">An API for reading translations stored in the mod's <c>i18n</c> folder.</param>
    /// <exception cref="ArgumentNullException">An argument is null or empty.</exception>
    /// <exception cref="InvalidOperationException">The <paramref name="modDirectory"/> path does not exist on disk.</exception>
    public ModHelper(IModMetadata mod, string modDirectory, Func<SInputState> currentInputState, IModEvents events, IGameContentHelper gameContentHelper, IModContentHelper modContentHelper, IContentPackHelper contentPackHelper, ICommandHelper commandHelper, IDataHelper dataHelper, IModRegistry modRegistry, IReflectionHelper reflectionHelper, IMultiplayerHelper multiplayer, ITranslationHelper translationHelper)
        : base(mod)
    {
        // validate directory
        if (string.IsNullOrWhiteSpace(modDirectory))
            throw new ArgumentNullException(nameof(modDirectory));
        if (!Directory.Exists(modDirectory))
            throw new InvalidOperationException("The specified mod directory does not exist.");

        // initialize
        this.DirectoryPath = modDirectory;
        this.GameContent = gameContentHelper ?? throw new ArgumentNullException(nameof(gameContentHelper));
        this.ModContent = modContentHelper ?? throw new ArgumentNullException(nameof(modContentHelper));
        this.ContentPacks = contentPackHelper ?? throw new ArgumentNullException(nameof(contentPackHelper));
        this.Data = dataHelper ?? throw new ArgumentNullException(nameof(dataHelper));
        this.Input = new InputHelper(mod, currentInputState);
        this.ModRegistry = modRegistry ?? throw new ArgumentNullException(nameof(modRegistry));
        this.ConsoleCommands = commandHelper ?? throw new ArgumentNullException(nameof(commandHelper));
        this.Reflection = reflectionHelper ?? throw new ArgumentNullException(nameof(reflectionHelper));
        this.Multiplayer = multiplayer ?? throw new ArgumentNullException(nameof(multiplayer));
        this.Translation = translationHelper ?? throw new ArgumentNullException(nameof(translationHelper));
        this.Events = events;
    }

    /****
    ** Mod config file
    ****/
    /// <inheritdoc />
    public TConfig ReadConfig<TConfig>()
        where TConfig : class, new()
    {
        TConfig config = this.Data.ReadJsonFile<TConfig>("config.json") ?? new TConfig();
        this.WriteConfig(config); // create file or fill in missing fields
        return config;
    }

    /// <inheritdoc />
    public void WriteConfig<TConfig>(TConfig config)
        where TConfig : class, new()
    {
        this.Data.WriteJsonFile("config.json", config);
    }

    /****
    ** Disposal
    ****/
    /// <inheritdoc />
    public void Dispose()
    {
        // nothing to dispose yet
    }
}
